板块运动包含板块之间的运动和板块内部的运动两个方面。板块与板块以碰撞—俯冲相遇时,俯冲作用推动载体向另一板块下消亡,俯冲板块便发生消减现象,未完全消减的残留载体或混杂堆积体,成为另一板块增生时的楔体,沿消减带成线状出露,便构成所谓消减杂岩(subduction complex)。研究消减杂岩中的沉积物,对说明俯冲位置和蛇绿岩性质有重要意义。一、消减作用及消减杂岩中沉积物产地分类大洋板块向大陆板块俯冲消亡时,发生消减作用。洋壳及其沉积盖层成了板块运动加工的原料,有的变为消减生成物,在大陆一侧造成中酸性岩浆活动;有的变为消减改造物,加入到高压低温变质带中;有的变为消减转化物,重返地幔开始新的对流;有的变为消减残留物,以构造楔片、混杂堆积形式出现。随着板块理论在我国的普及,地学研究出现了“板块热”。但是,人们在消减残留物的研究上则侧重 Plate movement includes the movement between plates and plate movement within two aspects. When collision happens between subduction and subduction, the subduction promotes the subduction of the carrier under another subduction, and the subducting slab subsides. The residual carrier or mixed subduction which has not been completely reduced becomes the wedge when the other plate accretively grows Subduction belt into a linear exposure, they constitute the so-called subduction complex (subduction complex). Research to reduce the sediment in the complex, to explain the subduction position and ophiolite nature is of great significance. First, the role of depletion and abatement of sediments in the classification of sediments Subducted ocean plate subduction of the continental plate, the occurrence of diminishing effect. The oceanic crust and its sedimentary cover have become the raw materials for plate motion processing, some of them become abatement products and cause the magmatic activity on the mainland side. Some of them become abatement retrofit and are added into the high-pressure and low-temperature metamorphic belt. There are Into diminishing transformants, re-entering the mantle to begin a new convection, and some to diminishing residues, forming wedges and promiscuous accumulation. With the popularization of plate theory in our country, the study of geology has appeared “hot plate”. However, people focus on the research on eliminating residues